title: Fluorescence and phosphorescence properties of new long-lasting phosphor Ba4(Si3O8)2:Eu2+, Dy3+.
abstract: A novel long-lasting phosphorescence (LLP) material Ba4(Si3O8)2:Eu2+, Dy3+ with high chemical stability was achieved successfully. Two emission centers (Eu (I) and Eu (II)) were found in Ba4(Si3O8)2 due to the substitution of Eu2+ in different Ba2+ sites. Both  Eu (I) and Eu (II) had contribution to the afterglow process, however, the decay rate of Eu (I) was higher than that of Eu (II). Ba3.982(Si3O8)2: 0.008Eu2+, 0.01Dy3+ exhibited a long-lasting phosphorescence whose duration was more than 24 h. Through the analysis of the thermoluminescence (TL) curves, we found that Eu2+ single doped Ba4(Si3O8)2 has a possibility to be a kind of storage phosphor. This work provides a new and efficient candidate for LLP and storage materials.
authors.affiliation: Department of Materials Science, School of Physical Science and Technology, Lanzhou University, Lanzhou, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Gong
authors.forename: Yuhua
authors.initials: Y
authors.lastname: Wang
authors.forename: Yanqin
authors.initials: Y
authors.lastname: Li
authors.forename: Xuhui
authors.initials: X
authors.lastname: Xu
authors.forename: Wei
authors.initials: W
authors.lastname: Zeng
mesh_terms: D001464:Barium / Q000737:chemistry*; D005453:Fluorescence; D008163:Luminescent Measurements / Q000379:methods*; D008422:Materials Testing; D017640:Silicates / Q000737:chemistry*
chemical_list: D017640:Silicates; D001464:Barium